An Ajax system can be configured to meet the requirements of the inevitability principle (German: Zwangsläufigkeit).
To do this, you need to integrate certain third-party door-locking devices into an Ajax system.
Prerequisites
To arm an Ajax system according to the inevitability principle, you need the following door-locking devices installed on the door:
- One of Ajax opening detectors or a third-party reed switch.
- A third-party blocking element.
- A third-party bolt switch contact.
- A third-party electric lock (if necessary).
To add door-locking devices to an Ajax system, you can use inputs of the following Ajax integration modules:
To control door-locking devices, you can use the outputs of the following Ajax relays:
Configuration
An Ajax opening detector or a third-party reed switch checks whether the door is closed before arming. If a third-party reed switch is used, connect it to the input of an Ajax integration module to notify the system of its status.
A blocking element is used to ensure the door remains locked while the system is in armed mode. This element is connected to the relay’s output and to the integration module’s input. The relay controls the blocking element, and the integration module allows the system to check its status.
A bolt switch contact checks whether the bolt of the door lock is extended. It is connected to the input of the Ajax integration module to send its status to the system.
When using a third-party electric lock, use the relay’s output to control it.
If any door-locking device requires external power, use an external power supply in accordance with the requirements of the device manufacturer.
System setup
In the hub settings, it is necessary to:
- Enable System integrity check.
- Enable the Bolt lock state option.
- Disable the Arming permission option.
Ensure that all devices in the system operate without delay when leaving.
